28026812 has 48 divisors (see below), whose sum is σ = 57425760. Its totient is φ = 11827200.

The previous prime is 28026787. The next prime is 28026827. The reversal of 28026812 is 21862082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66362 + ... + 66782.

It is an arithmetic number, because the mean of its divisors is an integer number (1196370).

Almost surely, 2^28026812 is an apocalyptic number.

28026812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28026812 is an abundant number, since it is smaller than the sum of its proper divisors (29398948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28026812 is a wasteful number, since it uses less digits than its factorization.

28026812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 28026812 is about 5294.0355117812. The cubic root of 28026812 is about 303.7557912945.

Adding to 28026812 its reverse (21862082), we get a palindrome (49888894).

The spelling of 28026812 in words is "twenty-eight million, twenty-six thousand, eight hundred twelve".